Scanning electron microscopy of Ferrisia Malvastra (Mcdaniel) (Hemiptera: Pseudococcidae) [electronic resource]:

Includes bibliographic reference

In the present study Ferrisia malvastra (McDaniel) is recorded for the first time in Sudan, since only four species were recorded there, i.e. Planococcus citri (Risso), Ferrisia virgata (Cockerell), Maconellicoccus hirsutus (Green) and Phenacoccus solenopsis Tinsley. The present study deals with the morphology of the female of this mealybug by using electron microscope. The ultrastructure of antennae, claw and its digitules, anal opening, valva, cerarius, circulus and wax producing pores were examined and illustrated. The result revealed that antennae consists of 8 segments, they were measured and their sensella were described. The claw denticle is absent and its digitules are knobbed. The circulus is present. There is only one pair of stout conical setae cerarii on the anal lobe, all of these features are used to distinguish between genera of Pseudococcidae. Also, the wax producing pores were illustrated; they are two types, the trilocular pores which produce the fine coiled wax filaments covering the body and forming the lateral wax filaments and the multilocular pores which surrounding the valva and produce the ribbon like wax which form ovisac.

Summary in Arabic